Have a Dell Inspiron 1420 with Vista,Sirius Internet radio used to work on it ok but now goes thru motions, gets to READY but goes no further. Talked to Sirius Tech support everything installed like it's sipposed to be but won't play sound. Any ideas? Checked firewall and cookies etc but won't work. Worked up until 9 months ago. Works fine on other XPlaptop and desktop. HELP?